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1. No point going for DX7 Pro..if you want to pair with 887, 2. D90 is almost the same price with DX7 Pro with the 10% off from AliExpress with code "SOUNDNEWS" link below: https://m.aliexpress.com/item/4000470941560.html?trace=wwwdetail2mobilesitedetail (until 31st Jan 2020)
3. It does sound different, AKM compare to ESS.. with the latest AKM.it sounds better..and the slam...damn. On my gears atleast.
4. Is all about your pairing. I'm on D90 - 887 - Modded LCD

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Hey guys, can someone confirm that turning-off your PC will shut the D90 down (ie soft shutdown where the front panel display goes dark)? If so, does putting your PC to 'sleep' have the same effect? I can confirm the D70 does NOT do this (unless you press and hold the front power button).
Reason I ask is my D70 doesn't 'see' my PC about 25% of the time and am wondering if the D90 will do better...

I have the D70 and just want to confirm it turns on with the PC and turns off a minute after the PC goes to sleep. Not a single problem with it's visibility for now. But I have it only for about three weeks now. Tried two different USB cables, the original one that came with the dac and some longer third party one. The dac is plugged into a usb 2.0 port, haven't tried it with USB 3.0. I really doubt there are any differences between the D70 and D90 in that regard. Are you sure you have the auto option on the D70 turned on? I also considered replacing the D70 with the D90 after initial listening due to the lack of bass-I-am-used-to-with-an-impact but gave up after inserting an inexpensive FX-Audio Tube-03 preamp/buffer with AD797+OPA627 opamps and JAN GE5654W tubes into the system. Oh, my, now it's like I have a completely different device from a league above. Maybe to try a fourth cable? I believe it is some compatibility issue. Can you try it with some other PC or laptop? If you can try to connect it through the optical (spdif) to anything (PC/TV/anything), it should behave the same (turn on/off with the signal).

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So reading more about this DAC post-AKM 4499, the Current to Voltage Conversion is done by 4 TI OPA1612 Op-amps. So this first external part of the analog signal chain feeding your RCA and XLR outputs, you can find a lot about them here http://www.ti.com/lit/ds/symlink/opa1612.pdf

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I have the D70 and just want to confirm it turns on with the PC and turns off a minute after the PC goes to sleep. Not a single problem with it's visibility for now. But I have it only for about three weeks now. Tried two different USB cables, the original one that came with the dac and some longer third party one. The dac is plugged into a usb 2.0 port, haven't tried it with USB 3.0. I really doubt there are any differences between the D70 and D90 in that regard. Are you sure you have the auto option on the D70 turned on? I also considered replacing the D70 with the D90 after initial listening due to the lack of bass-I-am-used-to-with-an-impact but gave up after inserting an inexpensive FX-Audio Tube-03 preamp/buffer with AD797+OPA627 opamps and JAN GE5654W tubes into the system. Oh, my, now it's like I have a completely different device from a league above. Maybe to try a fourth cable? I believe it is some compatibility issue. Can you try it with some other PC or laptop? If you can try to connect it through the optical (spdif) to anything (PC/TV/anything), it should behave the same (turn on/off with the signal).

I stand corrected about the D70 not having the auto shutdown feature the D90 has. It does. And yes, it turned out my 'auto option' was not set to "Auto". It is now. Connection problem is still persisting. No matter though. I appreciate all your suggestions... I've decided to upgrade to the D90 anyway. When I get it and if connection is still an issue, I'll do some more in-depth experimenting and post back what the fix was. Thanks again for your suggestions!

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It did 'quiet' the signal path removing a faint 'buzzing' issue with my last set-up, I'm guessing a ground issue. I was told (earlier in this thread) that with the later quality DACs, such as Topping, it was unnecessary, and in fact its presence it the signal path could potentially degrade the original signal. I've since removed it and the 'buzz' is not apparent with the D70. I'm planning to hold onto it for now and do some further experimenting when I have time.

The 'normal' D90 is just new and costs USD 699,99. It is expected that the MQA version will cost $100 to $150.- more than that. But an official price is not yet known. The MQA version is not a successor for the D90. Both versions will co-exist.